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Cushion|Lab Grown|IGI

5.51ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG722522546

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG722522546

Diamond specifications and retailer prices

From £878 GBP
$1,176 USD
As of October 31, 2026
Save £4,272 GBP (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £5,150 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 5.51ct lab-grown cushion diamond

This 5.51ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG722522546 or 722522546. Listed at 17 retailers as of October 31, 2026, with prices from £878 to £5,150, a £4,272 spread on the same certified stone. Brilliant Earth lists it at £5,150. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

5.51
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG722522546
Dimensions10.31 × 10.18 × 6.80 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.31 mm10.18 mm5.51 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG722522546
Side View
Table 61.0%Crown 36.6°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 66.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £5,150 GBP|Low: £878 GBP|High: £10,008 GBP|Avg: £2,571 GBP|-48.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 11
Retailer 12
Retailer 13
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Retailer 18
October 31, 2026
Retailer 18£878 GBP
Retailer 6£910 GBP
Retailer 16£990 GBP
Retailer 17£1,015 GBP
Retailer 7£1,234 GBP
Retailer 12£1,317 GBP
Retailer 3£1,451 GBP
Retailer 11£1,493 GBP
Retailer 2£1,844 GBP
Retailer 13£1,849 GBP
Retailer 10£2,247 GBP
Retailer 8£2,514 GBP
Retailer 5£2,782 GBP
Retailer 4£2,821 GBP
Retailer 14£3,090 GBP
Retailer 9£3,176 GBP
Retailer 15£4,366 GBP
Brilliant Earth£5,150 GBP

39 data points across 18 retailers

17 retailers£878 GBP to £5,150 GBP

A
Cheapest Retailer
-
£878 GBP
$1,176 USD
Final sale: no returns
Retailer 2
-
£910 GBP
$1,219 USD
View
Price last confirmed 21 days ago
Retailer 3
-
£990 GBP
View
Price last confirmed 14 days ago
A
Retailer 4
-
£1,015 GBP
$1,360 USD
View
A
Retailer 5
-
£1,234 GBP
$1,653 USD
View
A
Retailer 6
-
£1,317 GBP
View
A
Retailer 7
-
£1,451 GBP
$1,944 USD
View
A
Retailer 8
-
£1,493 GBP
€1,905 EUR
View
A
Retailer 9
-
£1,844 GBP
A$3,801 AUD
View
A
Retailer 10
-
£1,849 GBP
ZAR 40,013 ZAR
View
B+
Retailer 11
-
£2,247 GBP
$3,011 USD
View
B+
Retailer 12
-
£2,782 GBP
$3,727 USD
View
B+
Retailer 13
-
£2,821 GBP
$3,780 USD
View
B+
Retailer 14
-
£3,090 GBP
View
B+
Retailer 15
-
£3,176 GBP
$4,256 USD
View
Retailer 16
-
£4,366 GBP
$5,850 USD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
15673761A · Oct 31
£5,150 GBP
$6,900 USD
View
16 more retailers have this diamond
Prices start from £878 GBPSave up to £4,272 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
5.51ct Cushion
£878 GBP